From: Ben Pfaff Date: Wed, 24 Feb 2010 21:43:50 +0000 (-0800) Subject: ofctl: Improve manpage. X-Git-Url: https://pintos-os.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=ed951f15779df008e43012d99cdb51f3c5a57229;p=openvswitch ofctl: Improve manpage. This better documents how TCP/IP field matching works, and adds documentation for ARP. --- diff --git a/utilities/ovs-ofctl.8.in b/utilities/ovs-ofctl.8.in index 29e5bc76..8f8c4cfe 100644 --- a/utilities/ovs-ofctl.8.in +++ b/utilities/ovs-ofctl.8.in @@ -220,11 +220,12 @@ Matches IEEE 802.1q Priority Code Point (PCP) \fIpriority\fR, which is specified as a value between 0 and 7, inclusive. A higher value indicates a higher frame priority level. . -.IP \fBdl_src=\fImac\fR -Matches Ethernet source address \fImac\fR, which is specified as 6 pairs -of hexadecimal digits delimited by colons (e.g. \fB00:0A:E4:25:6B:B0\fR). -.IP \fBdl_dst=\fImac\fR -Matches Ethernet destination address \fImac\fR. +.IP \fBdl_src=\fIxx\fB:\fIxx\fB:\fIxx\fB:\fIxx\fB:\fIxx\fB:\fIxx\fR +.IQ \fBdl_dst=\fIxx\fB:\fIxx\fB:\fIxx\fB:\fIxx\fB:\fIxx\fB:\fIxx\fR +Matches an Ethernet source (or destination) address specified as 6 +pairs of hexadecimal digits delimited by colons +(e.g. \fB00:0A:E4:25:6B:B0\fR). +. .IP \fBdl_type=\fIethertype\fR Matches Ethernet protocol type \fIethertype\fR, which is specified as an integer between 0 and 65535, inclusive, either in decimal or as a @@ -232,37 +233,65 @@ hexadecimal number prefixed by \fB0x\fR (e.g. \fB0x0806\fR to match ARP packets). . .IP \fBnw_src=\fIip\fR[\fB/\fInetmask\fR] -Matches IPv4 source address \fIip\fR, which may be specified as an -IP address or host name (e.g. \fB192.168.1.1\fR or -\fBwww.example.com\fR). The optional \fInetmask\fR allows restricting a -match to an IPv4 address prefix. The netmask may be specified as a dotted -quad (e.g. \fB192.168.1.0/255.255.255.0\fR) or as a CIDR block +.IQ \fBnw_dst=\fIip\fR[\fB/\fInetmask\fR] +When \fBdl_type\fR is 0x0800 (possibly via shorthand, e.g. \fBip\fR +or \fBtcp\fR), matches IPv4 source (or destination) address \fIip\fR, +which may be specified as an IP address or host name +(e.g. \fB192.168.1.1\fR or \fBwww.example.com\fR). The optional +\fInetmask\fR allows restricting a match to an IPv4 address prefix. +The netmask may be specified as a dotted quad +(e.g. \fB192.168.1.0/255.255.255.0\fR) or as a CIDR block (e.g. \fB192.168.1.0/24\fR). +.IP +When \fBdl_type=0x0806\fR or \fBarp\fR is specified, matches the +\fBar_spa\fR or \fBar_tpa\fR field, respectively, in ARP packets for +IPv4 and Ethernet. +.IP +When \fBdl_type\fR is wildcarded or set to a value other than 0x0800 +or 0x0806, the values of \fBnw_src\fR and \fBnw_dst\fR are silently +ignored. . -.IP \fBnw_dst=\fIip\fR[\fB/\fInetmask\fR] -Matches IPv4 destination address \fIip\fR. .IP \fBnw_proto=\fIproto\fR +When \fBip\fR or \fBdl_type=0x0800\fR is specified, matches IP +protocol type \fIproto\fR, which is specified as a decimal number +between 0 and 255, inclusive (e.g. 6 to match TCP packets). +.IP +When \fBarp\fR or \fBdl_type=0x0806\fR is specified, matches the lower +8 bits of the ARP opcode. ARP opcodes greater than 255 are treated as +0. +.IP +When \fBdl_type\fR is wildcarded or set to a value other than 0x0800 +or 0x0806, the value of \fBnw_proto\fR is silently ignored. . -Matches IP protocol type \fIproto\fR, which is specified as a decimal -number between 0 and 255, inclusive (e.g. 6 to match TCP packets). .IP \fBnw_tos=\fItos\fR Matches IP ToS/DSCP field \fItos\fR, which is specified as a decimal number between 0 and 255, inclusive. Note that the two lower reserved bits are ignored for matching purposes. +.IP +The value of \fBnw_proto\fR is silently ignored unless +\fBdl_type=0x0800\fR, \fBip\fR, \fBicmp\fR, \fBtcp\fR, or \fBudp\fR is +also specified. . .IP \fBtp_src=\fIport\fR -Matches UDP or TCP source port \fIport\fR, which is specified as a decimal -number between 0 and 65535, inclusive (e.g. 80 to match packets originating +.IQ \fBtp_dst=\fIport\fR +When \fBdl_type\fR and \fBnw_proto\fR specify TCP or UDP, \fBtp_src\fR +and \fBtp_dst\fR match the UDP or TCP source or destination port +\fIport\fR, respectively. which is specified as a decimal number +between 0 and 65535, inclusive (e.g. 80 to match packets originating from a HTTP server). +.IP +When \fBdl_type\fR and \fBnw_proto\fR take other values, the values of +these settings are silently ignored. . -.IP \fBtp_dst=\fIport\fR -Matches UDP or TCP destination port \fIport\fR. .IP \fBicmp_type=\fItype\fR +.IQ \fBicmp_code=\fIcode\fR +When \fBdl_type\fR and \fBnw_proto\fR specify ICMP, \fItype\fR matches +the ICMP type and \fIcode\fR matches the ICMP code. Each is specified +as a decimal number between 0 and 255, inclusive. +.IP +When \fBdl_type\fR and \fBnw_proto\fR take other values, the values of +these settings are silently ignored. . -Matches ICMP message with \fItype\fR, which is specified as a decimal -number between 0 and 255, inclusive. -.IP \fBicmp_code=\fIcode\fR -Matches ICMP messages with \fIcode\fR. .PP The following shorthand notations are also available: .